WO2006017950A1 - Machines textiles et procede pour optimiser des points de rattache - Google Patents

Machines textiles et procede pour optimiser des points de rattache Download PDF

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Publication number
WO2006017950A1
WO2006017950A1 PCT/CH2005/000434 CH2005000434W WO2006017950A1 WO 2006017950 A1 WO2006017950 A1 WO 2006017950A1 CH 2005000434 W CH2005000434 W CH 2005000434W WO 2006017950 A1 WO2006017950 A1 WO 2006017950A1
Authority
WO
WIPO (PCT)
Prior art keywords
thread
textile machine
tension
piecing
time
Prior art date
Application number
PCT/CH2005/000434
Other languages
German (de)
English (en)
Inventor
Kurt Lovas
Frank Baier
Original Assignee
Maschinenfabrik Rieter Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Rieter Ag filed Critical Maschinenfabrik Rieter Ag
Priority to EP05761086A priority Critical patent/EP1778902A1/fr
Priority to JP2007526159A priority patent/JP2008510080A/ja
Publication of WO2006017950A1 publication Critical patent/WO2006017950A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/48—Piecing arrangements; Control therefor
    • D01H4/50—Piecing arrangements; Control therefor for rotor spinning

Definitions

  • the present invention relates to a textile machine, in particular an open-end spinning machine, with one or more mobile maintenance facilities, the means for re-spun a thread or its piecing after a yarn breakage and which is also equipped with a control device for controlling the textile machine. Furthermore, the invention relates to a method for piecing on jobs of textile machines, in particular open-end spinning machines.
  • Object of the invention is therefore to provide a textile machine or a maintenance device and a method of the type mentioned above, with the quality of the produced approaches with very little effort in a very short time can be determined.
  • the textile machine mentioned above is characterized in that a measuring device for measuring yarn tension and / or the yarn breakage of the yarn supplied by the textile machine and continuously passing thread is provided, the measuring device wholly or partly connected to a textile machine, the maintenance device or both is. If the measuring device is arranged in the manner according to the invention in the textile machine, the maintenance device or both, measurements of the thread tension or the thread breakage tension can be made virtually at any time, without requiring a separate provision of the measuring device. In addition, it is possible with the textile machine according to the invention to measure the continuously running thread, whereby a removal of the entire thread including the coil is eliminated. The working efficiency of the maintenance device or the textile machine is not or only imperceptibly impaired despite the measurements carried out.
  • a possible embodiment of the measuring device advantageously provides for this guiding and deflecting devices, as well as measuring means for determining the forces to be applied for the deflection of the thread, and that further calculating means are provided for calculating the thread tension resulting from the determined forces.
  • Coefficient of friction calculate the thread tension applied to the thread.
  • the determination of the forces acting on the deflection forces for example, by a flexible body in the direction of the force exerted by the thread, the deformation of which is determined by means of strain gauges. From the material properties of the bending body, the geometry of the measuring arrangement and the self-adjusting strain values of the bending body, the force occurring and thus also the yarn tension applied to the yarn can be determined.
  • the prior art discloses a multiplicity of measuring arrangements for determining thread tensions, which can be used in accordance with the invention in connection with the present invention. The basic principle is the same for all and is based on determining the thread tension in a direct way by determining the forces required to deflect the thread.
  • the measuring device has measuring means for determining the power consumption of a thread take-off device provided on the textile machine.
  • This is an indirect determination of the thread tension, which takes place, for example, via the power consumption or power output of a hydraulic drive or a pneumatic drive.
  • the drives used for the measurement serve to deduct the thread from the textile machine.
  • the yarn take-off drive has a certain constant power consumption at a certain yarn withdrawal speed.
  • Performance measurements are particularly easy to determine, for example, via pressure and volume determinations of the recorded drive media such as hydraulic fluid or compressed air.
  • the inventive textile machine with means for determining the thread tension in a particularly simple manner can be realized, since only the required power measuring devices are to be installed, which is possible, for example, in a maintenance facility without great effort.
  • Another particularly preferred embodiment of the invention provides that the yarn extractor device provided for a textile machine is electrically operated.
  • an electric drive for example, by means of an electric motor which can be designed as a stepper or servo motor, the measurement of the power consumption is particularly simple, since this only the absorbed current and the corresponding voltage is to be determined. Since thread take-off drives are usually already carried out electrically, such an embodiment according to the invention can be realized particularly easily on the spinning machine or the maintenance device.
  • the measuring device is connected to a control device of the textile machine and / or the maintenance device.
  • control devices are usually equipped with electronic processors run the predetermined programs. By means of such programs, the measurement data transferred from the measuring device to the control device can be further processed.
  • Control devices are usually already present on textile machines or maintenance devices, so that an implementation of the present invention is limited only to a corresponding adaptation of the programs to be executed, which is particularly time-consuming and cost-saving.
  • the control device can first detect the measured values determined by the measuring device, store them as far as desired and also analyze them. The results of the processing of the measured values can then be output to an operator, for example. This can be done by a display an expression or an acoustic message. For example, one possible result might be that if thread tension is not established after a successful thread release, the application length is too short and the thread end does not touch the interior of the rotor. This result can then be communicated to the operator who manually corrects the thread breakage length.
  • a parameter optimization method to be stored in machine-readable form in the control device.
  • the servicing device for textile machines is characterized in that it is equipped with a measuring device for measuring the thread tension and / or the thread breaking tension according to one of the preceding claims.
  • the pooling or common arrangement of all required components in a maintenance facility is particularly advantageous in practice, since the maintenance facility can thus independently carry out an optimization of the attachment sites.
  • Both the required measuring device and the control device together with the instructions stored therein in the form of programs act together in one unit.
  • a maintenance facility at one of many workstations of a textile machine can perform piecing optimization, store the piecing parameters determined in the process, and use a textile machine for the other workstations.
  • the service facility would be limited to the parameters determined only applies to jobs that have the same or sufficiently similar configuration.
  • the method proposed in the remainder of the invention is advantageously characterized in that the thread tension is measured directly on the supplied thread and is made according to the result of an optimization of the piecing parameters.
  • the inventive method allows due to the simultaneous or particularly timely measurement of the thread tension on the continuous thread particularly rapid determination of the optimized piecing parameters and affects the production operation at most very slightly.
  • the optimization of the piecing parameters achieves the production of particularly uniform and tear-resistant piecing sites.
  • the thread take-off length, the dwell time of the thread in the rotor or the thread take-up length is preferably used as the piecing parameter
  • Thread withdrawal speed optimized but it is also possible to optimize several parameters at the same time. This can be done, for example, by means of a mathematical algorithm or other program instructions which take into account the various parameters to be optimized and the values, states or results obtained from the measurement.
  • one possible form of optimization of piecing points is that the thread withdrawal speed is reduced iteratively when the thread tension is present, so that the thread tension increases during subsequent iteration steps.
  • This type of optimization is based on the finding that with a decrease in the thread withdrawal speed, the strength of the piecing points increases up to a certain maximum value.
  • the minimum value of the yarn withdrawal speed depends on numerous factors, such as climatic factors, machine condition and type of thread to be produced or type of yarn used fiber material. In order to determine the minimum value as exactly as possible, the thread withdrawal speed is reduced iteratively until thread breakage occurs. Thereafter, it is advantageous that the thread withdrawal speed or the dwell time of the thread end in the rotor is changed in a predetermined manner, if after one of the iteration steps a yarn break is detected.
  • the predetermined manner may provide, for example, that after determining the thread break, the yarn draw-in speed last used is increased by a fixed percentage, for example 10% or 20%. This can be achieved that in the further course of production also taking into account occurring variations piecing with optimal strength produced while the risk of thread breakage is largely eliminated.
  • Fadenabsch may provide that in the absence of thread tension a predetermined Fadenabschein iteratively increased. If the thread end does not reach the inside of the rotor after it has been dropped, then the piecing attempt must inevitably fail. This error is detected by the non-occurring increase in thread tension after the thread has been removed. A gradual increase in Fadenabschacia creates the desired remedy.
  • the residence time of the dropped thread end in the rotor is shortened when the thread tension is present first and its drop before being accelerated to the thread withdrawal speed. If the thread end remains too long in the rotor without being pulled off, the thread as a whole experiences excessive twist, which leads to a twisting off. An earlier pulling the thread end creates this remedy.
  • a further advantageous embodiment of the invention provides that when dropping the thread tension after the beginning of the thread withdrawal between an abrupt drop and a steady waste is distinguished. It was found that the Both types of drop in thread tension are based on different causes of error.
  • the associated measure for error correction provides a lowering of the thread withdrawal speed or an increase of the fiber supply into the rotor.
  • the determination of the thread tension advantageously takes place in that it is determined by deflection forces and / or the power consumption, in particular in this case the power consumption, of thread withdrawal devices.
  • the power consumption in particular in this case the power consumption, of thread withdrawal devices.
  • These types of measurements are easy to implement and very accurate.
  • the measurement of power consumption for example, the drive motors of thread take-off devices, can be done in a particularly simple manner and is easily feasible on the machine.
  • a particularly efficient work is achieved if the parameter optimization is carried out at a workstation of a textile machine and the result is taken over at other workstations, in particular at similar workstations.
  • the piecing parameters determined in this case can then be taken over by the maintenance device or the textile machine at all other workstations.
  • the efficiency of the maintenance device remains essentially unchanged. Only at a first Spinning place is a slightly longer stay in order to carry out the parameter optimization required.
  • Figure 1 is a schematic side view of an inventive
  • Figure 2 shows a time course of power consumption
  • Figure 3 shows a time course of current consumption and thread withdrawal speed of a second error state
  • Figure 4 shows a time course of power consumption
  • Figure 5 shows a time course of power consumption
  • FIG. 1 shows a schematic side view of a textile machine 1 according to the invention.
  • the textile machine 1 in the present example is an open-end spinning machine.
  • sliver 2 is processed into a thread 3.
  • the sliver 2 is provided for this purpose in cans 4, which are optionally provided via a can supply 5 in an automatic manner or alternatively manually on the textile machine 1.
  • the sliver 2 is fed by means of a feed roller 6 to a subsequent opening roller 7. From there, the separated fibers, driven by a negative pressure flow, enter the interior of a rotor 8 where they are spun by rapid rotation of the rotor 8 at the yarn end of the thread 3.
  • the required for the spinning operation Underpressure is generated by means of a suppression device 9.
  • the yarn 3 spun in this way is pulled out of the interior of the rotor by means of a thread take-off drive 10 and is subsequently guided to a reel 11, where it is wound up.
  • the drive of the spool 11 is carried out in normal operation via a winding roller 12.
  • the spool 11 is driven by an auxiliary drive roller 13 of a service device 14.
  • the maintenance device 14 has a control device 15, which is connected, inter alia, via the lines 16 to the auxiliary drive roller 13, the thread take-off drive 10 and a thread tension measuring device 17.
  • the thread tension measuring device 17 operates in the present case with a mechanical measuring arrangement.
  • the continuous thread 3 is guided over two outer deflections 18 and deflected by an inner deflection 19 from its normal thread course.
  • the thread 3 exerts a restoring force on the inner deflection 19 in the direction of the arrow 20 with increasing thread tension.
  • the force exerted in the direction of the arrow 20 is determined with known force measuring devices. Strain gauges can be used for this purpose, for example, if the inner deflection 19 is a mechanical bending arm which, in the present case, has the shape of a cylindrical formed axis. But also other measuring devices, such as load cells o.a. can be used to determine the restoring force.
  • the thread tension measuring device 17 can also be dispensed with if the control device 15 determines the force or power required for the thread withdrawal via the power consumption of the thread take-off drive 10. This can be done for example by determining the current consumption of the electrically driven thread take-off drive 10.
  • Maintenance device 14 equipped with a storage device which is disposed within the control device.
  • this memory device is the inventive method stored in the form of machine-readable programs and is called and executed when the appropriate conditions.
  • the method according to the invention which is intended for execution on the basis of textile machines, is explained in more detail.
  • FIG. 2 shows a diagram of the time course of a thread take-off speed and a current consumption of an electric drive used for the thread take-off.
  • the time t is plotted on the horizontal axis of the diagram.
  • the thread take-off speed V On the vertical axis is the thread take-off speed V and the current absorbed by the drive means I.
  • V the thread take-off speed
  • I the current absorbed by the drive means I.
  • the time t 0 marks the time of the thread take-off.
  • a maintenance device of an open-end spinning machine can serve as the piecing device.
  • the held therein thread is released at time t 0 and sucked by a prevailing in the machine vacuum in the direction of a spinning rotor.
  • the released thread end reaches the rotor. It comes in contact with the rotor is set in rotation and slides along its sliding walls in the direction of the fiber collecting groove, where it is spun with the fibers simultaneously supplied.
  • a tensile force is exerted on the thread end.
  • the thread take-off drive used In order to avoid pulling the thread into the rotor, the thread take-off drive used must consequently exert a corresponding counterforce. This can be done for example via servo motors. To exercise the retention force of the thread take-off drive requires a holding current IH. If the end of the thread stays in the rotor for a certain period of time, it will eventually experience too many twists. This leads to a break of the spun yarn Time t ß by turning off. The thread drive device then has to spend no more force to hold the wacky thread end, which can be read in a drop in power consumption to zero. By means of the inventive method, will now be found that actual course to be expected target course after the time t ß deviates the current consumption of one.
  • the current consumption would remain at the value I H of the holding current until a time ti, which indicates the beginning of the yarn draw-off from the rotor.
  • the premature drop in power consumption thus indicates the twisting of the thread, whereupon a correction process is initiated.
  • the correction process shown by a broken arrow starts between the times t B and t
  • he can also use at a later date, for example, after ti or t 2 . This is then associated with unnecessary time losses.
  • Thread withdrawal speed is increased to the final delivery speed. This is the case at time t 3 .
  • the current consumption at time ti only increases up to the level of the no-load current IL. Furthermore, it increases approximately linearly with the yarn withdrawal speed. While in previously known piecing a thread break is only recognizable by means of arranged in the later thread path yarn detectors can be detected by means of the inventive method of the presence of a fault already at the time tß. The drop in current consumption to zero before time ti namely indicates the yarn break much earlier. In addition, the thread break not only much earlier, but also determines its cause more accurately become. Namely, in the illustrated error form, it can clearly be seen that the reason for the error occurring is too late insertion of the thread withdrawal at the time ti.
  • the advance of the time ti can be done, for example, in fixed predetermined steps in an iterative manner or by measuring the time duration between the current drop at time t ß and the time ti and a corresponding advance by this difference value. It is also possible additions are predetermined by means of which the time period to which the time ti is advanced, for example, extended even to 10% or 20%, so that with a security thread withdrawal at a sufficient distance before the time t ß occurs. When using an iterative method, it can be specified, for example, that, after a successful piecing process, an additional advance of the time ti by, for example, 1 or 2 additional steps occurs.
  • FIG. 3 shows another possible embodiment of a method according to the invention.
  • a power consumption nor an increase in power consumption is registered in the subsequent period.
  • the thread take-off drive it can now be concluded that the thread end has not reached the rotor or its inside, otherwise corresponding tensile forces would occur, which in turn would cause a power consumption of the thread take-off drive.
  • the piecing device can from a time point, which is before the time t 0 of the Fadenabquees again start the piecing process. This is then done with a corrected Fadenabqueinus, which corresponds to an extended Fadenabquemother in the present case.
  • the correction can also take place in iterative predetermined steps.
  • fixed percentage values or other calculation algorithms may also be used to determine the corrected thread deflection length, for example.
  • the method of Figure 3 thus allows a rapid determination of the presence of an error and beyond the nature of the error. It is thus avoided that the thread take-off drive with a non-spun yarn must pass through the curve shown after the time ti pointless.
  • FIG. 4 shows a preferred embodiment of the invention, in which after the yarn is dropped at the time t0, the yarn end at time two in the interior of the rotor comes into contact with the fibers to be started.
  • the power consumption of the thread take-off drive increases to the holding current IH.
  • the thread withdrawal speed V starts to increase from zero.
  • the current of the thread take-off drive increases in proportion to the thread take-off speed V. In practice, however, depending on the type of drive means used, deviations may result.
  • FIG. 5 shows an embodiment in which the thread is dropped at the time t 0 after the yarn has been dropped. From the time t H o this attacks as described previously in Figure 4 on the rotor and is held there for a short while. From the time U also here the beginning of the thread take-off takes place. The thread take-off speed V increases starting from the value zero continuously, which also applies to the recorded by the thread take-off drive current I. From the time t B an occurring error begins with a gradual thread breakage. This gradually occurring thread breakage is characterized by a gradual decrease in power consumption of the thread take-off drive. While he was at the time t ß is still almost equal to the power consumption of a fault-free operation, so the power consumption has at time t 2l the date on which the
  • Thread withdrawal speed is increased more, compared to a faultless course already significantly reduced.
  • the current consumption then gradually drops down to the no-load current IL.
  • Such an error occurs, for example, if too few fibers are fed into the rotor.
  • Another possible cause of the error is that the thread take-off speed is too high.
  • a correction can be made by increasing the fiber supply or reducing the yarn withdrawal speed.
  • the corresponding correction process can use TSS at the time after the occurrence of yarn breakage and like back to a time before the thread drop t0 begin again before a piecing.
  • a tolerance can be specified as desired, within which the power consumption deviates from a given current consumption may, without a thread break is detected. The greater the tolerance, the safer a thread break will be but also the later.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Abstract

L'invention concerne une machine textile, en particulier une machine de filature à fibres libérées, laquelle machine comporte un ou plusieurs dispositifs de surveillance mobiles, qui présentent des moyens permettant de recommencer ou d'amorcer le filage d'un fil après une rupture du fil et sont également équipés d'un dispositif de commande destiné à commander la machine textile. L'invention se caractérise en ce cette machine textile comporte un dispositif de mesure destiné à mesurer la tension et/ou la tension de rupture du fil fourni en continu par la machine textile, ledit dispositif de mesure étant entièrement ou partiellement installé sur la machine textile, sur le dispositif de surveillance ou sur les deux à la fois.
PCT/CH2005/000434 2004-08-19 2005-07-22 Machines textiles et procede pour optimiser des points de rattache WO2006017950A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP05761086A EP1778902A1 (fr) 2004-08-19 2005-07-22 Machines textiles et procede pour optimiser des points de rattache
JP2007526159A JP2008510080A (ja) 2004-08-19 2005-07-22 繊維機械ならびに継ぎ目を最適化する方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410040214 DE102004040214A1 (de) 2004-08-19 2004-08-19 Textilmaschine und Verfahren zur Ansetzeroptimierung
DE102004040214.0 2004-08-19

Publications (1)

Publication Number Publication Date
WO2006017950A1 true WO2006017950A1 (fr) 2006-02-23

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PCT/CH2005/000434 WO2006017950A1 (fr) 2004-08-19 2005-07-22 Machines textiles et procede pour optimiser des points de rattache

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EP (1) EP1778902A1 (fr)
JP (1) JP2008510080A (fr)
CN (1) CN101006215A (fr)
DE (1) DE102004040214A1 (fr)
WO (1) WO2006017950A1 (fr)

Families Citing this family (10)

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DE102005059078A1 (de) * 2005-12-10 2007-06-14 Saurer Gmbh & Co. Kg Verfahren zum Anspinnen eines Fadens sowie Rotorspinnmaschine zur Durchführung des Verfahrens
DE102007018536B4 (de) * 2007-04-19 2018-05-30 Saurer Germany Gmbh & Co. Kg Offenend-Spinnmaschine
DE102012103346A1 (de) * 2012-04-17 2013-10-17 Maschinenfabrik Rieter Ag Fadenspleißvorrichtung mit einer Einrichtung zur Festigkeitsprüfung von Fadenverbindungen
CN102877170B (zh) * 2012-10-17 2015-01-14 上海华鸢机电有限公司 一种纺纱张力调节曲线学习装置及学习方法
JP2014088638A (ja) * 2012-10-30 2014-05-15 Murata Mach Ltd 糸巻取機及び糸巻取方法
DE102014003329A1 (de) * 2014-03-08 2015-09-10 Saurer Germany Gmbh & Co. Kg Verfahren und Vorrichtung zum Betreiben einer Offenend-Rotorspinnmaschine
CN105442123B (zh) * 2014-09-05 2019-03-01 欧瑞康纺织有限及两合公司 加弹机及能耗检测系统
DE102015000570A1 (de) * 2015-01-17 2016-07-21 Saurer Germany Gmbh & Co. Kg Verfahren und Vorrichtung zum Bewerten der Spleißverbindungen
DE102018007591A1 (de) * 2018-09-26 2020-03-26 Saurer Spinning Solutions Gmbh & Co. Kg Verfahren und Vorrichtung zum Detektieren einer Fadenschlinge bei einer Arbeitsstelle einer Auflaufspulen herstellenden Textilmaschine
CN113755978B (zh) * 2021-09-18 2022-09-16 东华大学 一种基于张力反馈的自动接头机器人柔顺装置

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US5509261A (en) * 1993-03-26 1996-04-23 W. Schlafhorst Ag & Co. Stepping motor arrangement for driving a silver feed roller in a rotor spinning machine
US6272832B1 (en) * 1999-04-21 2001-08-14 W. Schlafhorst Ag & Co. Service unit for a cheese-producing textile machine

Also Published As

Publication number Publication date
CN101006215A (zh) 2007-07-25
EP1778902A1 (fr) 2007-05-02
DE102004040214A1 (de) 2006-03-02
JP2008510080A (ja) 2008-04-03

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